rapidship929 Store TOSHIBA STRATA DK RDSU1A CARD RDSU INTERFACE BOARD YOU ARE looking ON A TOSHIBA RDSU1A INTERFACE CARD. THIS CARD WILL WORK ON DK280 & DK424 TOSHIBA PHONE SYSTEMS.TESTED AND WORKING GOOD![!brand:toshiba!][!mpn:RDSU1A!]